package chapter04.exam30;

public class exam30 {
    public static void main(String[] args) {
        int result = divide(4,-2);
        System.out.println(result);
    }
    public static int divide(int x,int y){
        if(y<0){
        throw new DivideByMinusException("除数是负数");
        }
        int result = x/y;
        return result;
    }
}
